Malicious PDF — malware analysis report

Static analysis result for SHA-256 0050a7553528ddcb…

MALICIOUS

PDF

46.3 KB Created: 2020-08-31 13:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 060d6184b12c91879f658473aa7f2dcc SHA-1: 6fac6360e915120ea838b467dc18f43713af5ab1 SHA-256: 0050a7553528ddcbb61a7e4cbab5ed8e96a44813c772322bd4fe5559145e90eb
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and contains a large number of external links. One of these links points to a known malicious redirector, suggesting a phishing or content-luring attempt. The document body, though heavily obfuscated, also contains the malicious redirector URL.

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.ru/wix?keyword=the+maze+runner+the+fever+code+summa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/696b8a_274af28f018b4d5583fd352e2ece43a7.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_73546dd5b71947b3af7a09de236a388f.pdf
    • https://static.usrfiles.com/ugd/162fe6_b30521949c5c4d18a539c3053427f101.pdf
    • https://static.usrfiles.com/ugd/b8c837_8966cdd46d774439b8575ae65da3d8bf.pdf
    • https://static.usrfiles.com/ugd/b7082a_8e998a50739f4e8583c3b8a3b7580c20.pdf
    • https://static.usrfiles.com/ugd/b8c837_c468c2040188450289c3949a2aa6740d.pdf
    • https://static.usrfiles.com/ugd/15ebe2_e8430afe21344309a0a62b2d938ca57d.pdf
    • https://static.usrfiles.com/ugd/d5415a_97d14e45ea3a4af68d96d62c88c7874b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f19b026a2444fb8a703bc85c9544f80.pdf
    • https://static.usrfiles.com/ugd/2e79a6_f132371ffeb24e74bae931922f90e90d.pdf
    • https://static.usrfiles.com/ugd/5899d5_672285af6ef3428989409056777cafae.pdf
    • https://static.usrfiles.com/ugd/0049ca_d12ce17d75cb45d5b475d80e7e77ac0e.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/mateb.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/56235500480.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/94334639878.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.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_off00006985.bin
b78708a0d79c306d35ce8ebb67406ec3350fb0c11d290f1bafa234a0ef29e5c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6985 5124 bytes
font_01_sfnt_off00007acb.bin
45cf07dd733243265c9f1c121be2e335d8ef8fee1e40156faf1bbd262f8ffc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 10276 bytes
font_02_sfnt_off00009deb.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEB 4324 bytes

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