Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4eb5f357f9c906…

MALICIOUS

PDF

48.4 KB Created: 2020-08-27 13:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65d4303dfb5aae5a1fd3ba692e0667d SHA-1: a90f49c855112bb61a04f8d902c46b885b31575d SHA-256: fa4eb5f357f9c906bc4ef09927c93c6584cfef93044d315d44290fb4e1be1dd7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as a download for 'Fable 3 mods pc download'. This suggests a lure to trick users into downloading malicious content. The PDF also hosts a large number of links to other PDFs on Shopify domains, likely for SEO manipulation to improve the ranking of the malicious redirector. The ML classifier strongly indicated maliciousness.

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.club/pify?keyword=fable+3+mods+pc+download
    • http://demag.gwheelerfishingguide.com/uploads/1/3/2/8/132816202/3453291.pdf
    • http://files.abbydecoratingden.com/uploads/1/3/0/8/130874050/8119147.pdf
    • http://files.emmashugs.com/uploads/1/3/2/6/132683260/tusidukeruwom.pdf
    • http://fesefamak.gradient.services/uploads/1/3/0/7/130776485/2643954.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/market_and_main_bedford_nh.pdf
    • https://cdn.shopify.com/s/files/1/0428/6464/0159/files/ziwapemoroluvapedek.pdf
    • https://cdn.shopify.com/s/files/1/0437/8243/9063/files/uber_earnings_report_today.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/diff_between_accuracy_and_precision.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/jitumepanutugafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/34964865612.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/3069433643.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/84793439906.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/danemorosupijibesi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9686/files/production_of_antibiotics_penicillin.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/48545754054.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/86979189970.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1662/files/wevoganem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/10270493088.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dac.bin
3f63fd9f6b8be1cfe5b0b657f56d42eab12591b2711f1c62842ae8a7787497ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAC 5476 bytes
font_01_sfnt_off0000904d.bin
b7b6359a19d46da68bc7379692f5f563ac89536192eeac24350ce5fc599820ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904D 10820 bytes

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