Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5222f53a6f9cecf…

MALICIOUS

PDF

39.0 KB Created: 2020-10-17 05:38:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 172857283c7c07b131f826a5dee8407a SHA-1: ece715494d511ad4bd89868e1a201cd06454ec3b SHA-256: d5222f53a6f9cecf7af026721b6cf9c8b668827c86f93e2655951eb6804f57ac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=volkswagen+rabbit+diesel+manual In PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/d1db2.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/xivutimumarumanede.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/9f9c5ea9e5d.pdfIn PDF document text
    • https://buluzuzumaz.weebly.com/uploads/1/3/1/6/131636727/vusidosotuzoxe_xudoxav.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/1219044.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/kegigesominamij_jurefobu.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/4514735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7502/6078/files/nidewemozebuderugiwasaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9204/1624/files/korematsu_middle_school_bell_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7961/2578/files/77439915082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/54555217255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2000/4761/files/retrovirus_gene_therapy_pros_and_cons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3935/8882/files/cast_of_in_the_heat_of_the_night_show.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3224/8469/files/tv_guide_newport_news.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6445/1221/files/15398830634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0165/8522/files/pokemon_sound_effects_soundboard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4302/7613/files/vuzunetokidusapipuwugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/what_was_ulrich_von_gradwitz_wish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/faster_internet_2x_apk_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/in_gods_presence_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4035/7538/files/best_linear_unbiased_estimator.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_off000059e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 5408 bytes
SHA-256: 485200d33e40feb3ed69a01cd3d4201866085b170e77179ce835358abbcd8d10
font_01_sfnt_off00006c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3E 10004 bytes
SHA-256: 7b04aaf08d9332badeffdb8f36f4ffaaa7f598ad21ae3359944da36ec08bdcd3

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