Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d27c5690c5d2475…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 20:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 096dc22814ed3a0ca7d46cd94786308f SHA-1: 09167285e992d2ac1cd4e346e9a4b8ad20995de4 SHA-256: 6d27c5690c5d247516aca56850ff6a140a9f8f26377de13824cacf1e5460c3f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a "Teradata sql tutorial pdf". This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The PDF also hosts a large number of links to other PDFs, potentially for SEO manipulation or to obscure the malicious link. No scripts were extracted, and the document body is heavily obfuscated.

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.cc/wix?keyword=teradata+sql+tutorial+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/fakalobarelibimowafikaxo.pdf
    • https://cdn.shopify.com/s/files/1/0446/5829/4937/files/c_section_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/sassi-_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/persuasive_speech_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/rivevafaweta.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/kemaxekop.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/21883152921.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/wivaxefubunafozi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6446/6335/files/dog_drinking_juice_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/67409973742.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_2c7c65b20b764dd6b051a0264a14f3b6.pdf
    • https://static.usrfiles.com/ugd/8acad3_8b94aa0f912b48848fbe54c36647abdd.pdf
    • https://static.usrfiles.com/ugd/87d215_0ae38146bd83478fb88139c05e06c0e1.pdf
    • https://static.usrfiles.com/ugd/e4ff69_35f77cd65cce4e9cbe01927b248aa448.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a66a358fb194abda97b10b1206df8a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_9757a9fd410f454e90d91bf7c36e36fc.pdf
    • https://static.usrfiles.com/ugd/daca0d_49b258698e6942d5ad886b5283dafbae.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_2bce81640cde483bac4e8afb4158d385.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_off00006366.bin
f02d784e48c1b5dae63fe04d5128c53d8ab3636057997105cd430254cc14c40b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6366 5112 bytes
font_01_sfnt_off000074d6.bin
5302144f202b443495dd8898eb4d11eb35dff38940d0f147b8a477f0bf8766f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D6 11704 bytes

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