Malicious PDF — malware analysis report

Static analysis result for SHA-256 800808d7bb97431c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 22:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 278240626b645581a6a63f954ef6a27f SHA-1: 6a16f36ce7d3c9e9a887b6f235315856a29312b1 SHA-256: 800808d7bb97431c5b3f009470bfa3403dca516a437ece333b46c0c4482c1053
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains text related to 'free printable batman coloring pages pdf' and the primary malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring users to malicious infrastructure via deceptive content.

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.com/wb?keyword=free%20printable%20batman%20coloring%20pages%20pdf
    • http://files.jocelynoades.com/uploads/1/3/1/1/131163969/62df46cf9d19.pdf
    • http://vudanizad.heartlanddeermanagement.com/uploads/1/3/1/0/131071164/ee54b43510a.pdf
    • http://files.lelouvrecake.com/uploads/1/3/0/7/130775606/69e83a7cc6.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7383/files/mobuxujuwuzogeluvebuzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7322/3321/files/paliwebamuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7385/5903/files/tafesutaxaxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/12615065270.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/mokased.pdf
    • https://cdn.shopify.com/s/files/1/0438/8513/3992/files/quantitative_aptitude_questions_with_answers_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0434/5616/8093/files/79247098234.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/budojimususebiniwovebuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/sakonogutegigomomas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/pulosupaxitevele.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/26299141449.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/wosusagezepoxazegefagot.pdf
    • https://cdn.shopify.com/s/files/1/0441/2456/9752/files/40752059892.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_off0000592c.bin
9e57339e345e9ab69d925ebae9234a135ca3040d11a62abadb2f0d4aa4e88f65
pdf-font-stream PDF embedded font (sfnt) at offset 0x592C 5568 bytes
font_01_sfnt_off00006bef.bin
a8f604fdbad597eb0de1d13ff8703263855e438c8287eaa535458027ce734072
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 9864 bytes