Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab1152ddd805488…

MALICIOUS

PDF

35.2 KB Created: 2020-08-06 11:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa85cab434075b83f03482316a826fd SHA-1: 884532288c1985f260c96dd07725784e152c8319 SHA-256: 2ab1152ddd805488824e6ea01330782d5b2a3377b9bc011075a99465d01c5df7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This indicates a link farm or SEO poisoning technique designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=begin+the+beguine+clarinet+pdf
    • http://files.inspiredft.com/uploads/1/3/1/4/131405948/4017639.pdf
    • http://files.delmarinelloart.com/uploads/1/3/1/6/131606631/xogudapikoj-zikovibikibofo-zozub-nenaxazap.pdf
    • http://files.kaiserdanes.com/uploads/1/3/1/4/131454549/fedf202977.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6102/files/breath_of_the_wild_food.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/47686460982.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/92812663347.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/moxugap.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/lukodawujokoxefisinenam.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/english_grammar_test_b1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/troy_bilt_675_series.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/44680628653.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/nifitejuzixodukuwivixaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/26839795348.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/lowufufezemimonexekux.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/sadovukunudifeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/mizuxazarezulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/43474353999.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_off00004b24.bin
29708e7e4fd9ac68265a8a49130222712bc1fbaf618e470012a776efa7855335
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B24 5428 bytes
font_01_sfnt_off00005d98.bin
5895b988894ee7318ab99e0b9330220cadb665a97e6ba4aecf738ee466bec9fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D98 10020 bytes