Malicious PDF — malware analysis report

Static analysis result for SHA-256 1153f0f1e3a5681f…

MALICIOUS

PDF

41.4 KB Created: 2020-10-26 14:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 408d9ab9baa601290395535318ce8a74 SHA-1: 2f537697232782b543ceb84b5cba72931fa70ba7 SHA-256: 1153f0f1e3a5681f73aeb7ed1a809751b3bbe93d926200ca278a932634ae50ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, specifically designed to trick users into downloading software. The document body and heuristics indicate a lure for a game download, which is a common tactic for distributing malware. No scripts were extracted, but the presence of malicious redirector links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/123?keyword=rusted+warfare+1.13+apk+full+version+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5f9311de42f91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f8f75e43b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_5f930b616a210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f88dd01b1700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/85576321073.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/wixewodera.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/buffer_analysis_in_gis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758cc473-2078-4999-bb8f-20fc6c4cb63f/taduvilazeguze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e734ce9-3c75-4525-bb9e-0872d19be39c/69886186774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/17223809994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/anti_pinger_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2511/2477/files/protein_synthesis_worksheet_5_mutations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4037/5462/files/35681117669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6945/8582/files/staghorn_sumac_tree_poisonous.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/14393655674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/cash_advance_on_direct_express_card.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3206/files/chapter_7_similarity_test_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/zigobusijipuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2782/3264/files/oceanic_fish_aquarium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/faviwalimim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1752/5188/files/tarurapefapukiva.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C53 5504 bytes
SHA-256: 20f6eb973a58258e766f8c08f5f88c6a09279cbd629a007235c4192ca3f930c2
font_01_sfnt_off00006f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F44 13700 bytes
SHA-256: 3ab42ce22ce369f05b419478f24e7b4d648fc37ee79b896eff22090cfacbbdc9