Malicious PDF — malware analysis report

Static analysis result for SHA-256 015b55a1e21628dd…

MALICIOUS

PDF

73.6 KB Created: 2020-08-07 07:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 728c6413f49c829dd74427568d412760 SHA-1: 1d2276bc9845c43057d8a8a17ae350196b4f37ef SHA-256: 015b55a1e21628dd5da6a688d566b84ef772ec7f7cdf9c16a951f613af91d3bb
202 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document's content and heuristics strongly indicate an advance-fee scam lure, aiming to trick users into clicking the malicious link under the guise of receiving a prize or parcel.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=amoeba+sisters+video+recap+dna+replication+answers+pdf
    • http://files.dan-ebert.com/uploads/1/3/0/7/130775958/tumodukoru.pdf
    • http://files.premieraestheticshouston.com/uploads/1/3/1/0/131070566/matexe-fekew-gojimavuf-wagav.pdf
    • http://files.project-cosmetics.com/uploads/1/3/2/6/132682883/dorefabalew-pifetotefoxo.pdf
    • http://files.ccfreelancejournalist.co.uk/uploads/1/3/2/7/132711983/vilelevekibemufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/59553273694.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1539/files/zabavuzosuzivefoneme.pdf
    • https://cdn.shopify.com/s/files/1/0434/8392/2585/files/usps_business_change_of_address_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/22649380186.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/1632135740.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/12118582131.pdf
    • https://cdn.shopify.com/s/files/1/0437/9820/0481/files/51689964766.pdf
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/champions_league_schedule_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/49592697028.pdf
    • https://cdn.shopify.com/s/files/1/0434/5557/8273/files/baronemobesunowive.pdf
    • https://cdn.shopify.com/s/files/1/0449/6467/5752/files/op_factions_servers_1._8.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/arrowhead_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/99066366032.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2af.bin
fe2a6f1f960b2fec9ae194879dab43a8a9941ad327356d1b27e4119704cc28f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AF 5584 bytes
font_01_sfnt_off0000f5a5.bin
00765047109875c73435e8c26eace828363e2a5adba2dc852b2c9a80e9740e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A5 10288 bytes

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