Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b50629c185b8c3…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 20:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01baf14576d8fa7fb4106fc9fb20d155 SHA-1: 7607c1d64148af3d3664b45ab3066d077378148e SHA-256: 11b50629c185b8c38b89f2cb17442fa01610331877e80df80dcf4419d71f6c4d
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though partially garbled, suggests a lure related to an 'infrastructure pipeline report'. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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=nsw+infrastructure+pipeline+report
    • http://nalabad.thephillykitty.org/uploads/1/3/1/3/131398473/ed2802f4.pdf
    • http://files.stopwrightscrossing.org/uploads/1/3/1/8/131872238/wixoj.pdf
    • http://files.dogamelbourne.com/uploads/1/3/1/4/131483222/rewanubiwepoxa-rekoxoraga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/champions_league_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/2017_pontiac_grand_prix.pdf
    • https://cdn.shopify.com/s/files/1/0439/4414/9150/files/joe_mettle_turning_around_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/losojuginulosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/23674030028.pdf
    • https://cdn.shopify.com/s/files/1/0450/3647/0430/files/aap_beeti_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/wirikefevaduxajugojabat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/4_star_hotel_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/6553/1806/files/8988343991.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/39315300452.pdf
    • https://cdn.shopify.com/s/files/1/0433/2204/8667/files/tiwazivasepavabuzemif.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d88.bin
b77f338829cc08b8594233b5c2b79c854409e0219c8345b1eef3c35f14e4645e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5072 bytes
font_01_sfnt_off00006edd.bin
ee65ebda3826379f54661d2cae2e7450c454744470154057ee685a443612ffae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDD 9892 bytes