Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd48b9080a34021…

MALICIOUS

PDF

40.4 KB Created: 2020-08-15 01:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6b5aac241488da1d7bba0df6f64655d SHA-1: 1b8bd3043616efb62e1f3f1c7fe939c9353e07ff SHA-256: 1dd48b9080a34021f0236e7208c85a4bb8891fcce42105f92e466c9ee93b556e
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to external PDF files. One URL, 'https://ttraff.ru/wb?keyword=has%2023000%20lppom%20mui%20pdf', is identified as a malicious redirector. The presence of a link farm suggests an attempt to manipulate search results or distribute further malicious content, aligning with a phishing or SEO poisoning attack pattern.

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/wb?keyword=has%2023000%20lppom%20mui%20pdf
    • http://likanawu.rebsyoung.com/uploads/1/3/1/3/131397997/tabuw_kaxuborirurer.pdf
    • http://derujanat.wmualphalambdadelta.org/uploads/1/3/1/1/131164250/nadimotelaxuvogigu.pdf
    • http://levido.urbanexchangekeene.com/uploads/1/3/0/7/130776158/pelaterafa_nipal_legigutagor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2315/4850/files/ffxiv_the_blessed_treasury.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/fate_extra_ccc_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/kovili.pdf
    • https://cdn.shopify.com/s/files/1/0434/0806/4677/files/migekufukikibomalijax.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/futasedotabinobovanar.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/papadigaworavozamom.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/77093465781.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/8757113374.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2039/files/tetebutaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/comethazine_bawskee_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/43219303690.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff8.bin
e2b7e82f0c9815f5bf914343d364a2debf0fd28f0fe1c3364867a7ba0be54c66
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF8 5492 bytes
font_01_sfnt_off00007288.bin
c6fcf2dcb0916a7ced24efb528ce452d7b63c1bc0cb3204583728dc56091fa17
pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 10068 bytes