Malicious PDF — malware analysis report

Static analysis result for SHA-256 7234d54ac35e541d…

MALICIOUS

PDF

55.6 KB Created: 2020-08-12 08:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7a001eeff73fe9a22a510145b0a17ba SHA-1: 6ab248f5c73376bcc92b0975ed9d7b5bc9310a81 SHA-256: 7234d54ac35e541d7b34816a1707e6e5767c3e611887f71cba5328d35572dcbb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a primary link to a known malicious redirector, disguised as information about career options. The ML classifier strongly indicated maliciousness. The document's structure and embedded links suggest an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=after+12th+science+best+career+option+pdf
    • http://files.amazinggracebridgetown.ca/uploads/1/3/1/3/131383698/jurisunobimer_lekifuw.pdf
    • http://files.chosenoneministries.net/uploads/1/3/0/7/130776131/wowaxowin_tafovixubafuwep_vixapibabolo_firefosu.pdf
    • http://files.ahhs60.org/uploads/1/3/0/9/130969980/7504855.pdf
    • http://files.rocmrrc.com/uploads/1/3/1/0/131069887/foremumetosakase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/1681/3735/files/70272017700.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/retegatoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/0025/1036/files/screen_list_windows.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/94073298239.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/bifififibelozaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/nomuzowitaxipaxagazabug.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/31652439024.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/bikoxunusegenuxowudujiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/luselulukuderuravaneviwuj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000761b.bin
445ae1545095a6f367be6b8a47598ff56979010baaa712807c3b9ac74aa06c57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 5312 bytes
font_01_sfnt_off00008817.bin
9baa32d7db495706247e75aedce1313e581423c38b54541a39cd97bf2571539d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 14484 bytes
font_02_sfnt_off0000b54e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB54E 4324 bytes
font_03_sfnt_off0000c34f.bin
aca1160a9f11ec9617ef8458dde377ce97c014530ef704e5cf45a163325fd4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC34F 3532 bytes

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