Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3916f043308eddf…

MALICIOUS

PDF

60.0 KB Created: 2020-08-05 17:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 588a6747c78ce6faee50acceb9822553 SHA-1: 0030f0f8d914f3dd3375007817886ba8d51f243d SHA-256: a3916f043308eddfdec88c88d2a1c1f0aca43f2b48047758e581e1b4995f7db7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ahsan+ul+hidaya+pdf+download'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=ahsan+ul+hidaya+pdf+download
    • http://files.mealmastermpc.com/uploads/1/3/1/3/131379406/lagopojivujapakit.pdf
    • http://files.heritagefireequipment.com/uploads/1/3/1/8/131856860/aee0e.pdf
    • http://files.myacousticlife.com/uploads/1/3/2/6/132682051/zoriviwikifidedix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8321/8588/files/user_s_guide_to_capitalism_and_schizophrenia.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/ziwejogonazanadaxovetawup.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/cardiopatia_isquemica_aguda_y_cronica.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/rovutek.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/xemofefikanulig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/fijufu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/lokobe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/binofepisox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8610/files/aws_security_blog.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/67714321139.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/43120435012.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/tarusefetefutafenod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a81d.bin
877d3f097884faa175c5fff0f894e8c2d609056539ca5bbdb19665507e66a222		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA81D 25488 bytes
font_00_sfnt_off00006c7f.bin
64e01ba7174a20542017a6ca5373930f835abbbc45156be16f12576d568dae9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 4900 bytes
font_01_sfnt_off00007d26.bin
697fd8dc3c8c9215c736d7bec3c5b52dbe62ff1860efff9ecbb4ed80f7d350a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D26 13452 bytes
font_03_sfnt_off0000d476.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 4324 bytes

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