Malicious PDF — malware analysis report

Static analysis result for SHA-256 063d4ef6cc041b84…

MALICIOUS

PDF

60.1 KB Created: 2020-08-23 05:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 497d6293148e8ecfbeb0d460d9d4d719 SHA-1: be140e705a814a5cedf684b02db4102ada255e76 SHA-256: 063d4ef6cc041b8421a047b85a96e045635651b968551bc3a027046078398b92
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, suggesting an attempt to trick users into visiting a harmful site. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm designed to improve search engine ranking for malicious content.

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=designing+data+intensive+applications+pdf+2017
    • http://xijut.friendsofeverbloom.com/uploads/1/3/2/6/132695578/50c50cb8e1.pdf
    • http://files.vrugginks.com/uploads/1/3/0/9/130969683/nogamorejamarana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1914/0252/files/delegation_of_financial_power_rules_1978_schedule_v.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/79403515619.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/gowabotanega.pdf
    • https://cdn.shopify.com/s/files/1/0432/0765/5579/files/55863462684.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/49986928345.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/37147191841.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/doweketifiwub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/game_c._a._t._s_mod_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008954.bin
4b32fb2d0535119e8116b2b510ccd83c94e8f225a553d12bc45a97a96658d0f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 10688 bytes
font_01_sfnt_off0000ace6.bin
fb286dd1a715a097b8d37f23c91849549a5e3584aee27e811a8ff1af2facb444
pdf-font-stream PDF embedded font (sfnt) at offset 0xACE6 5692 bytes
font_02_sfnt_off0000c07b.bin
6785f21368f5cec9c82e051a3037a5dc6358ce2d7d925e7ed609d438f8ddca54
pdf-font-stream PDF embedded font (sfnt) at offset 0xC07B 10088 bytes