Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7bd9299bca35a2…

MALICIOUS

PDF

46.6 KB Created: 2020-10-25 00:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5efdf584f45d0cbf1774878c4a575ffe SHA-1: 80161e62638a0b0998fad0678c89cb562a2d9966 SHA-256: 7a7bd9299bca35a2bf1cffeea3a683f70bed56c05ac3cf9461ad09113df03916
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a job-related PDF. This suggests a phishing attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator.

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.com/aws?keyword=reason+for+leaving+current+job+best+answer+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_5f8a68cf59f71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f93ed7d58be2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8b2756d3ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5f918151457d9.pdfIn PDF document text
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/7987903.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/fowanazokuxig-gekevad-zenolumadi-bakelozoj.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/viwovon.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/e99b9.pdfIn PDF document text
    • https://bagubabijotete.weebly.com/uploads/1/3/4/3/134319258/meretopopo_zifuvegeraxero_jutebomolo_wobama.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/morijozaweve-radiru-guler.pdfIn PDF document text
    • https://jozokuxig.weebly.com/uploads/1/3/2/8/132814463/c385b3d7b86.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/4025374.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/1/0440/7777/7061/files/how_to_upload_image_using_retrofit_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5304/7195/files/33656779142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1934/3288/files/aprilia_srv_850_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/56280986486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1876/2415/files/rules_of_american_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1809/9094/files/judegerudodonel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6892/0486/files/ghostscript_to_png_high_quality.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9387/1778/files/86266729470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/mountain_bike_fenders_26.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/79856610259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/wakfu_build_sram_125.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_off0000744c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744C 5696 bytes
SHA-256: f65984289b030fdea96f8ea72ab50be5ce83778a7a37f84cb99da2040cf917a4
font_01_sfnt_off000087da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DA 10372 bytes
SHA-256: 86fa42c4be83bc173137aad0b56b2631b0205731ff23f9b3ac34c9b307eaad8d

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