Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a9e5eba72f3793…

MALICIOUS

PDF

47.5 KB Created: 2020-08-16 17:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21eca803686fa518b4f516a8599c153 SHA-1: ae73e8fcff75859c69f76eccccb3cb0e6b133ce9 SHA-256: 10a9e5eba72f3793f5b6e81978e491d713546da2961bf1e21c300d86bba340ba
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=gangster+movies+2019'. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating the primary purpose is to drive traffic to malicious sites. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggests a phishing or redirection attack.

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/pify?keyword=gangster+movies+2019
    • http://files.theirishdanceandmusic.com/uploads/1/3/0/7/130738568/3990302.pdf
    • http://files.wta54.org/uploads/1/3/2/8/132816202/5047231.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0850/6531/files/vocabulary_words_with_meaning_and_sentence_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/lulexenivej.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/4802713001.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/74480424244.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/agilent_hplc_software.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/vomijujokiraxuzax.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/jilevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/napufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/1568607321.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/acrobat_reader_for_windows_8_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4646/8769/files/femasesizitemax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/gujetu.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_off00006def.bin
45f6f1f73de041fe8582bbeb71a887ec4ab447f966d8b44b7fca42025b8070b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 5336 bytes
font_01_sfnt_off00008004.bin
4ce1c00012d601febbf92d0b8f2568642f114f1a20d7ba8136b8b09fae0135fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8004 10304 bytes
font_02_sfnt_off0000a33d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33D 4324 bytes

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