Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3347fa46bbdf40…

MALICIOUS

PDF

39.1 KB Created: 2020-08-12 05:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a520245d3d8e322a70dd8cb6c04b33a SHA-1: 8c55c0211a78b6deb67595ff052dd39e57e48fe0 SHA-256: 0f3347fa46bbdf40ed32042c2335827ad6c4b4fd041f7904621a3f433b1eb531
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The heuristic firings indicate the PDF is designed as a link farm and contains a callback phishing lure, likely to trick users into calling a fraudulent support number. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=insurance+law+manual+pdf, which is flagged as a malicious redirector.

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.
  • 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.
  • 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=insurance+law+manual+pdf
    • http://files.maryskitchenmeals.org/uploads/1/3/0/8/130813841/tovalowor.pdf
    • http://files.varsitystitchshop.com/uploads/1/3/0/9/130969390/7730339.pdf
    • http://boniz.vintagewoodworkingtools.com/uploads/1/3/2/6/132682663/wezafekafe-vonazazeka.pdf
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdf
    • http://nivixim.dynamismicons.com/uploads/1/3/2/6/132681947/f8a4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/meguxakijam.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/alloanamnesis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/64418879476.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/beyonce_lemonade_download_zip.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/tifaxukufukizarinawokamuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/spanner_types.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/35286609044.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/jutebojejolig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/romiette_and_julio_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/48929831369.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_off00005912.bin
e409b7ab2972fe4e259ff5b448bb61bbdb6c924ea454da664340b46a7f164e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5912 5332 bytes
font_01_sfnt_off00006b21.bin
0c6591eafc5371731b7bb1283138e5184018c81a3f270b36eef2bdd15b1887d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 10764 bytes

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