Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1a6af3b4e7ec2e…

MALICIOUS

PDF

48.4 KB Created: 2020-08-14 03:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3103aabaa6b4978fe26de81f7909789d SHA-1: c642f12a375d3db05c53ec2071d43c96225d4fed SHA-256: 9f1a6af3b4e7ec2e9feea0ac6ae040eab757f3b07876b00165f8bb38c15594bd
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL as the lure, suggesting an attempt to trick users into clicking it. The PDF_SEO_LINK_FARM heuristic indicates a large number of links were generated, likely for SEO poisoning to attract victims.

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.ru/pify?keyword=brahmachari+old+telugu+movie+songs+free
    • http://files.landzmanagement.com/uploads/1/3/2/6/132695701/5663068.pdf
    • http://xigus.lulabellestyle.com/uploads/1/3/0/7/130774965/9830522.pdf
    • http://xelomu.bremenfamilymartialarts.com/uploads/1/3/2/7/132710621/7655a823.pdf
    • http://files.landzmanagement.com/uploads/1/3/2/6/132
    • https://cdn.shopify.com/s/files/1/0434/0645/9029/files/goxonuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/72404102606.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/fidozufulubezawof.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/40607657134.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/mujibofinejipijazoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/foxfi_unlock_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/6208807204.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/mimatorexegurewekemu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2534/1343/files/adda247_current_affairs_july_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/fugivejonowujo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/bhojpuri_video_2016_dj_song.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_off00007770.bin
8f655c36c016f4d852a95a54c76142b8830e90d890435bcd5705c0fd1ab421d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 5544 bytes
font_01_sfnt_off00008a24.bin
6c880cbaf25405ae40061441557185196f90af42271e402ecd74f3981431a556
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 12780 bytes