Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95d119f16043a41…

MALICIOUS

PDF

52.3 KB Created: 2020-08-22 06:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d843bbbcaa5d3628083bcfee3f76f8 SHA-1: 8b992895ec5f3cdc17b89b3faae85224b976c449 SHA-256: e95d119f16043a416a0e1cdfc6874a91aa5b08446dcbc7e6bbfbbcc765dea8e2
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=2020+monthly+calendar+template+free'. This heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware delivery attempt. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, reinforcing the phishing pretext.

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.cc/pify?keyword=2020+monthly+calendar+template+free
    • http://files.mervyncharlton.com/uploads/1/3/1/4/131406202/naxuvobijulog.pdf
    • http://bawexi.milkandhoneystyletx.com/uploads/1/3/1/8/131856158/gigaxubesasu_vevuwukoboloni_dixuz.pdf
    • http://dapefa.utahstudentnurse.org/uploads/1/3/1/4/131438304/vezoziwofu-nobizobenofusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/bupizumuxonom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/zoology_mcq_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/harcourt_phonics_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/65946232623.pdf
    • https://cdn.shopify.com/s/files/1/0430/6072/3865/files/warframe_eidolon_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7415/files/speak_now_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/41479845930.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/nemuzugizetamujenovip.pdf
    • https://cdn.shopify.com/s/files/1/0444/4625/3222/files/netflix_movies_on_mac_air.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/audacity_plugins_autotune_free.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/
    • https://cdn.shopify.com/s/files/1/0431/646

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000735c.bin
b22fd1c3e99985f998680c5258f65b40be85c4ad480000cecdc25c0b6155b4d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735C 5496 bytes
font_01_sfnt_off000085d5.bin
439a76ab836787b7aa1fbd54fb65984ddc352bd583b5a58458deb1e6c6bedfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 10924 bytes
font_02_sfnt_off0000ab58.bin
2fe800452e7271ba035b9bed96336f431c88ee1fce6bd44691e84212db174c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB58 16940 bytes

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