Malicious PDF — malware analysis report

Static analysis result for SHA-256 62adbbd5fad52bfd…

MALICIOUS

PDF

46.5 KB Created: 2020-08-30 14:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 139723f455e5b27409d9644d8aa917f1 SHA-1: 305053e78d9c6d6ebfbe35e66680e9563b0e0a76 SHA-256: 62adbbd5fad52bfd896d92546e1a7cab0fd2f9d1f7d657ccf99dacf63763db63
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to a product review and a URL that matches the suspicious redirector. This suggests the PDF is part of a link farm or SEO spam campaign, potentially leading to malicious content or phishing pages.

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.com/wix?keyword=sony+s5500+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/58a813_53781a0216c14f71adf72a42b4c1cd9f.pdf
    • https://static.usrfiles.com/ugd/585b1d_ec2e41e5557d4d5abc1d96c20bb0a786.pdf
    • https://static.usrfiles.com/ugd/b8c837_2514bf244c0642bd965e8c4b80d22643.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/1223863389.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/canadian_citizenship_application_form_for_adults.pdf
    • https://static.usrfiles.com/ugd/b8c837_6836a9617dd74fd388871391ef6bd062.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_4929f63ad5ae49efbafba9bdb0042e46.pdf
    • https://static.usrfiles.com/ugd/c33cdb_7bf1763b94a4458baaf8ab107f26f34e.pdf
    • https://static.usrfiles.com/ugd/aff7ca_eefd008d94da46aa9fd82b661f3db161.pdf
    • https://static.usrfiles.com/ugd/b8c837_855f772ebb2943a78ef9bfa6a3b7f4fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_66906439af90418b9afd88414fe53845.pdf
    • https://static.usrfiles.com/ugd/286fb8_38cfaece4349411e83f400ea16bed1b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0490332ced44525988ae3e4ed2cb481.pdf
    • https://static.usrfiles.com/ugd/8b9728_9dfdbe98843e47dfbae9af46579e93f9.pdf
    • https://static.usrfiles.com/ugd/c20ea7_b9caa63e513d43abb9829cdbdf6e1454.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_off00007952.bin
27880d4b756dd6712ff38dc5e81e58165292824b1577ac12dd378b2e7bc333ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 5060 bytes
font_01_sfnt_off00008ab1.bin
86ef6ad78aa262217f62db14ff29e026f2aec1ee5e3600545e5a0b1f40714087
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB1 10272 bytes