Malicious PDF — malware analysis report

Static analysis result for SHA-256 661809611e5f51e9…

MALICIOUS

PDF

47.1 KB Created: 2020-08-12 04:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85fe1ad66abf5e83f51bffffc4f8cd04 SHA-1: c8706eadc1c635ee12f0a1dfd8a0934f983378c7 SHA-256: 661809611e5f51e962288c1a149d9044f3ef219b44dcb9b5b8c002aaee5ace82
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL is https://ttraff.cc/pify?keyword=types+of+variables+in+research+with+examples+pdf, which is flagged as malicious. The document body, though partially obfuscated, also contains this URL and other links, suggesting an attempt to lure users to external sites under the guise of providing research material.

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=types+of+variables+in+research+with+examples+pdf
    • http://files.financialwriterssociety.org/uploads/1/3/1/8/131858044/ef3db726.pdf
    • http://files.redmosaicjewelry.com/uploads/1/3/1/8/131857390/bazunilakap.pdf
    • http://files.palmcoastflautorepair.com/uploads/1/3/1/8/131856186/metegug_sogokasipegoka_fedasile_buwuwakapol.pdf
    • http://sunazevud.victimwitness.org/uploads/1/3/1/8/131856772/gotirojob_savadosi_radeso_kowob.pdf
    • http://files.efjja.com/uploads/1/3/1/4/131408024/kasoras.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/4398/6335/files/molewupisuwutaxoxerojetew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5199/7592/files/53732307235.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/naturumigir.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/a_single_shard.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/zanazuveruroxis.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/freedom_academy_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0432/5264/6050/files/3_month_workout_plan_to_gain_muscle.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/8822536037.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/machine_learning_stock_market.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/84730902260.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/nameramokojuw.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_off00006a9d.bin
afdb058d24f9e2b0410c36141af69492bfdcdd077bf7dea2dcf7374628cedb2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 5592 bytes
font_01_sfnt_off00007d87.bin
0b9df8f7bea7995dd4771032279278a6893db033f1465c2c373b37b16cd0ec27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D87 10280 bytes
font_02_sfnt_off0000a06e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA06E 4324 bytes

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