Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bc4fc990055a38…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 18:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee965ff7d4d345f222317a70176fbcb SHA-1: 79b18bd587164f1d7dbced42d1d3b649f33671d1 SHA-256: 45bc4fc990055a38ced053b112d7ea7edc12bc6d98b03312dbd7c122d3a0f21e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on cdn.shopify.com. One critical heuristic indicates these links are part of a "link farm" likely for SEO manipulation. Another critical heuristic flags a link to a known malicious redirector, `https://ttraff.link/pify?keyword=going+back+west+line+dance+pdf`. The presence of these links suggests a malicious intent to either distribute malware or engage in phishing activities through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/pify?keyword=going+back+west+line+dance+pdf
    • https://cdn.shopify.com/s/files/1/0460/6820/3675/files/nitric_acid_oxidation_of_benzoin_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/atc_code_list_bir.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/xavipoxipapobajobagad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/palipepovetovoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/ugly_truth_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0438/9342/4283/files/wudinajonigopexigomun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/61144106483.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/28457824305.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/dd_215_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/74478975261.pdf
    • https://cdn.shopify.com/s/files/1/0435/7704/9247/files/68979049287.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4758/files/72740022624.pdf
    • https://cdn.shopify.com/s/files/1/0429/4849/3475/files/94723478752.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/type_a_type_b_personality_test.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_off00005b4e.bin
8ddbabcffbfa284d81593d10a00a12d4752f5bce0c268e868ba2d97b19abcc10
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4E 5552 bytes
font_01_sfnt_off00006e61.bin
419d5253935518b54666c24f30a765bcfc75c8e4593cdd75ecb1ef8f44a54373
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 10624 bytes