Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f9370c0741d12c…

MALICIOUS

PDF

54.3 KB Created: 2020-08-26 17:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5527eeb9c30f1afa4e496f13a8428930 SHA-1: 0d8d1d17e3ee34a86126e0420f0b3dff00d5c647 SHA-256: 17f9370c0741d12c06e48ffffbe7a684135f7fc2544aa8722f2bfccb68b54a45
162 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. The presence of numerous links, including to potentially malicious infrastructure, suggests an attempt to drive traffic to external sites, possibly for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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=bentelan+1+mg+compresse+effervescent
    • http://notik.friendslakeshorepreserve.com/uploads/1/3/1/6/131607095/jotigezofo.pdf
    • http://files.sarahkramerharrison.com/uploads/1/3/2/6/132696145/7030813.pdf
    • http://files.amplifylabs.org/uploads/1/3/0/7/130776276/810021a6da621d2.pdf
    • http://files.newhopechurchnc.org/uploads/1/3/1/4/131406977/zapazamisebojak.pdf
    • http://files.missrodeowyoming.com/uploads/1/3/1/4/131437956/wufemiwiwosunij_xezanuzipu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/archero_hack_money_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/theory_of_interest_kellison.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/nifabesexaripupulerubafew.pdf
    • https://cdn.shopify.com/s/files/1/0454/8267/2280/files/pixupul.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/3252751864.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/tyler_the_creator_goblin_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7437/files/38037044359.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/zexerawomokimaxawenuzav.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0995/files/mififunisug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/vuwigoxeganexu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1212/6882/files/79743448977.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_off000088dc.bin
c50c15aedf68117374a8cddecb0c3339b788b1bef79af8d1c55f98b0554fe6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DC 5236 bytes
font_01_sfnt_off00009a9c.bin
dc99d5e7b3193a5841cd47edd2fa97644c4a08945c6901e27bce4bc02cedf0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9C 10328 bytes
font_02_sfnt_off0000bdea.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEA 4324 bytes

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