Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8644da0d87e431…

MALICIOUS

PDF

70.3 KB Created: 2020-08-08 00:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b026379578743c3ef0459157aa780805 SHA-1: 2cd8f53214878a71c553d6360bad74987b802f26 SHA-256: 7b8644da0d87e431468a5af85e3ae80e8882a4b75efb9cf6bf6d9aa0d38ddc03
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, including one to a known malicious redirector, and exhibits characteristics of an advance-fee scam lure. The document body, though heavily obfuscated, contains text suggesting a contract signature page, which is a common pretext for phishing or scam attempts. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm intended to improve search engine ranking for malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wb?keyword=contract%20signature%20page%20pdf
    • http://files.isolahandmadeoriginals.com/uploads/1/3/2/6/132695430/latawofenijovoposefo.pdf
    • http://files.partybcause.com/uploads/1/3/0/9/130969944/315890.pdf
    • http://files.townesquaresalons.com/uploads/1/3/1/8/131871690/vosub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/44576576672.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/11469174832.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/arduino_mega_2560_pinout.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/gitoganimoxilefujajalapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/tupagojerof.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/sownik_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/a._b._simpson_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/91204293258.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/brocade_cli_commands.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/fubuzovabuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/liserugijuzosa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/31485107268.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/gawovedapo.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_off0000cbb0.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 2828 bytes
font_01_sfnt_off0000d5aa.bin
0aaf5f7c59c9aa52e166f0e67203a7b4070a554c43bfbb4a395244393e1654dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5196 bytes
font_02_sfnt_off0000e75e.bin
40ccae217872505ba048f76e1385ff4096a55332c075e23da37b8b9dcc69b37b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75E 10160 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.