Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a23f42b70077d5…

MALICIOUS

PDF

53.0 KB Created: 2020-08-23 21:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0fc9a6d5c910314be8ad955d392459 SHA-1: edc983046e101b20f00b378e83d547e30bd20e10 SHA-256: e8a23f42b70077d53bf99d8a0344df84a380bb02ce4351bc880618782a1fc2b9
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=controls+and+variables+part+1+worksheet', is identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting it is a worksheet, likely a lure to encourage clicking the malicious link. No scripts were extracted, and the attack relies solely on social engineering via embedded links.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=controls+and+variables+part+1+worksheet
    • http://files.benkari.net/uploads/1/3/0/7/130739715/gatamela.pdf
    • http://files.powderkegfarms.com/uploads/1/3/0/7/130776728/9b3c3d1b74.pdf
    • http://tidagom.stocktonargo.com/uploads/1/3/2/6/132682787/bawodule_lixoluzup_jedarebigosepim_raronunivuxobap.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/cardiorespiratory_physiotherapy_adults_and_paediatrics_5th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/just_already_yet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/3581/1231/files/lavenufuwidumipilixunuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/mugemuwudarekagomadelire.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/96596889235.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/47133250027.pdf
    • https://cdn.shopify.com/s/files/1/0440/6149/1352/files/joborimotexerejavuxapegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/aadhaar_card_documents.pdf
    • https://cdn.shopify.com/s/files/1/0458/6419/0105/files/anjaana_anjaani_movie_480p_bolly4u.pdf
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/clara_dos_anjos_lima_barreto.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/77386761735.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_off00008fb8.bin
d617e54ec5e362727745e4aa7b780bdd2ef1eb768ef52ca6cf1b37f83fc6b381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB8 5360 bytes
font_01_sfnt_off0000a1fc.bin
d49333cc3cc2302ccc7ea5f84912b951ee2b9bafe2391b74d0f9b5e82ff7695a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FC 10960 bytes

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