Malicious PDF — malware analysis report

Static analysis result for SHA-256 6453b8067c3a808f…

MALICIOUS

PDF

53.9 KB Created: 2020-07-27 10:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7a0de1dbeb2c09e6459d6efa2623373 SHA-1: 61f31b0183c855f21b405cbaf959797fbe733c46 SHA-256: 6453b8067c3a808ff80231de14a1caca98d46331e2c7afa33705cc40c385d300
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, suggests a lure for 'free Spotify premium apk terbaru'. The presence of a malicious redirector and a link farm indicates an attempt to distribute malware or lead users to phishing sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=free++spotify+premium+apk+terbaru
    • http://files.oliviabarryptyoga.com/uploads/1/3/1/4/131414134/da225d.pdf
    • http://files.ourchildrensfund.com/uploads/1/3/0/9/130969562/vazijabitibogolef.pdf
    • http://files.rearfacingtoddlers.com/uploads/1/3/1/6/131606435/45d8d861e.pdf
    • http://files.earlystartconference2017.com.au/uploads/1/3/0/8/130814121/wedimo.pdf
    • http://files.cavanaughcoastalcoaching.com/uploads/1/3/1/0/131070820/88266.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31931154882.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/sumifopogotoxijabi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/ketemem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/49181046108.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/26956264949.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/bekizepijogivobumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/logetepupupaduziki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/bifogar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/gitobetow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/mazilamirazamipurotuvux.pdf
    • https://cdn.shopify.com/s/files/1/0428/4511/0438/files/65042837019.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/42015080467.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_off000094c8.bin
925e007083d317d797f8725924be60e3aede7e77f772fbc9cb8cd91b68f56058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C8 5052 bytes
font_01_sfnt_off0000a609.bin
4c09e43f10ed31522ed33262af5ff77edeabd9c7ff30cce058dfdf73eed43d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA609 10496 bytes

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