Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c635cddf57bac06…

MALICIOUS

PDF

44.9 KB Created: 2020-08-21 11:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e030787009a4b4d956ceab1b6cdc439b SHA-1: f4275a161da3b6390fad182a7237db980a95ba56 SHA-256: 1c635cddf57bac066d36ddf757e19c224d6fefb3704b5015dc2c6e93ac056c7e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=asme+pcc-+1+appendix+d+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm SEO tactic to improve search engine ranking for the malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=asme+pcc-+1+appendix+d+pdf
    • http://fujata.athleticadvantagellc.net/uploads/1/3/2/6/132681579/1fc7b.pdf
    • http://voditab.boothillherbs.com/uploads/1/3/1/3/131398097/9454860.pdf
    • http://ruwopak.americanhealthservices.org/uploads/1/3/2/3/132303124/0dc30325326.pdf
    • http://files.mhsrunningtribe.com/uploads/1/3/0/9/130969046/2af9b84d0.pdf
    • http://files.spiritfireretreatcenter.com/uploads/1/3/1/3/131398129/vutesopatobutimoze.pdf
    • https://cdn.shopify.com/s/files/1/0437/0962/8570/files/49186017063.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/judevapolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/i_80_traffic_report_nj.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/upsc_nda_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/application_form_sample_for_job.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6760/files/sowuvedokixarabizasasux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/brownie_my_best_self_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/2020_acute_ischemic_stroke_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/75646923244.pdf
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/90081292613.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/lichtman_s_atlas_of_hematology_free_download.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/
    • https://cdn.shopify.com/s/files/1/0431/5329/3469/files/90081292613

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e1e.bin
c99dc853e1304ced8f232b077758dab9bfeb2b53a1f182fb52dba99a851c9ae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1E 5316 bytes
font_01_sfnt_off0000802c.bin
0c0d412dc9aeb62b6bfdeb2ab1f1b06c501a56d40b2cd3f64fab1ed2ebaecbb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802C 12168 bytes

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