Malicious PDF — malware analysis report

Static analysis result for SHA-256 8522bf8e8edc7624…

MALICIOUS

PDF

37.8 KB Created: 2020-08-14 00:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2162ad5dd410d71f675f3c8a8ba77067 SHA-1: 1b95f8234e6ffdaefd84bb5fef718bd9d40077ef SHA-256: 8522bf8e8edc76248d1b82e10346e38fd4242e13d0511d949a6e4902939de407
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 redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=happy+birthday+cake+name+pooja, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting a phishing or scam attempt.

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=happy+birthday+cake+name+pooja
    • http://tanibe.mcbrideinternship.org/uploads/1/3/0/8/130814340/lovogezalojeb-nudulumawaxij-rikosopetufifo.pdf
    • http://files.affirmingleadership.com/uploads/1/3/0/8/130814229/dasitipoxebugo_foxukas.pdf
    • http://fipowoz.hishandsreader.org/uploads/1/3/1/1/131164239/dda7ba6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/99672997530.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/lumawufil.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/tovumojolarusolil.pdf
    • https://cdn.shopify.com/s/files/1/0439/4650/8456/files/abdullah_ocalan.pdf
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/microsoft_office_2016_mac_crack.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/abecedario_ruso_y_pronunciacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1959/files/15334644482.pdf
    • https://cdn.shopify.com/s/files/1/0430/5282/6773/files/reasoning_ability_questions_and_answers_with_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/how_to_use_eris_bot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/88039755482.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_off000056b3.bin
35b4b22cc932b15b1782e0b31c6dbf2f6d6576a52ba3fb8399454f6abbcb3dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B3 5444 bytes
font_01_sfnt_off00006906.bin
794bee73ede1e50c03b9a8ff09900a621abaf5bd6678d4f15a85a25cfa240560
pdf-font-stream PDF embedded font (sfnt) at offset 0x6906 9896 bytes