Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bc56f9be35d8ab…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 00:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01d3a1d0a9d646e3bf560ef21ed3901 SHA-1: 358a0f8127b2b1bcfe7d3ee20c02cf1811c6e544 SHA-256: 06bc56f9be35d8ab5fc7b299e13fd30b54a3c089cc443f4e38f0dfd45b81281d
170 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Fema is- 2200 test answers' and a URL that appears to be part of a link farm designed to attract traffic. The presence of a malicious redirector URL and the sheer volume of links suggest an attempt to lead users to harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=fema+is-+2200+test+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_47788ef48d5d4d738def1b46802aa7ca.pdf
    • https://static.usrfiles.com/ugd/409ca8_4fb4d3d673234205999a73bf505347bf.pdf
    • https://static.usrfiles.com/ugd/9904c2_90be415d0b08465d9708f3162ebac709.pdf
    • https://static.usrfiles.com/ugd/b8c837_321a160ba6674138a1b9479bc20edcbe.pdf
    • https://static.usrfiles.com/ugd/ef7b09_af3eafdf0ea14aec87ef08a62a1c46d9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/zadalorikinimupotategu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/full_service_maintenance_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/50318776722.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/pifatuzomeviluw.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/60229348190.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/descriptive_writing_sample_answer.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/pekobojuwodubufumun.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/siruvirazokega.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/what_happened_to_kissanime.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://static.usrfiles.com/ugd/3fc21f_4e2eb2daaa2a4d5bbb7f7f2c20f205c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d875d13cd1e6451d9ac5728e0dbfcc71.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac398deca5044b7582632b355e49fdfb.pdf
    • https://static.usrfiles.com/ugd/e745be_2a469b54daca4ea89849bde40fe102f8.pdf
    • https://static.usrfiles.com/ugd/cac9e4_92ecb14b7f5d4304b630a7ceabed2d2e.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_off00006563.bin
0c2ffae61e117934ef77a4c57ab77a76f72a064d0f61c9043850ca82a69ccd12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6563 5152 bytes
font_01_sfnt_off000076ea.bin
8f55e8f0edc5cf3c50fbb2e1fe4259838f2c2f63a35534291a64f3ae7027f368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 10208 bytes

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