Malicious PDF — malware analysis report

Static analysis result for SHA-256 101024ddb03b734a…

MALICIOUS

PDF

51.1 KB Created: 2020-08-24 09:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd99db412f53602552c9e938a85fadc SHA-1: 1df5f0d9785be218bb6649824c1a36ad3eccf1eb SHA-256: 101024ddb03b734a964e65b5121023b36f3536d7340df28991042829bf81c960
182 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 also contains a URL that appears to be part of a phishing lure for an application form. The presence of a link farm and a callback lure suggests a phishing or scam attempt designed to redirect users to malicious sites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=ibps+online+apply+form+2018
    • http://files.easystreetproductions.biz/uploads/1/3/0/9/130969572/vejijiguwaj_fukuvovifidef_xugapoge.pdf
    • http://woneful.claudiasclassroom.com/uploads/1/3/1/0/131070152/botoliza.pdf
    • http://files.deervalleydrivingschool.com/uploads/1/3/1/0/131070356/16abf4406396.pdf
    • http://files.madisoncountyyouthrunning.org/uploads/1/3/1/6/131637896/2099646.pdf
    • http://zeluzulim.ericaneils.com/uploads/1/3/2/7/132710780/3993323.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/botewijepazisomodofejonaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/babuforavego.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/takezikofizaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/cyclotron_and_betatron.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/1440281571.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdf
    • https://cdn.shopify.com/s/files/1/0463/4637/1229/files/cadila_healthcare_annual_report_bse.pdf
    • https://cdn.shopify.com/s/files/1/0459/1386/6389/files/aviary_photo_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0450/1169/7814/files/numl_online_admission_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/tojirote.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/33174207450.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_off00008962.bin
0f27569dc07d49372e660b5e5bc89ca7c37e62ecc79c3e017f3ba9cf89d722a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8962 5744 bytes
font_01_sfnt_off00009cdb.bin
4cb584b28bc0d0e8229475b11d24fae3ba9148c1511044bbf24d1c9a55e7ba90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDB 10144 bytes

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