Malicious PDF — malware analysis report

Static analysis result for SHA-256 85110be792cba8cb…

MALICIOUS

PDF

38.8 KB Created: 2020-08-16 21:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 116e136016e69026140978d3a81a6950 SHA-1: 71c83455d2fc5404055378aeabecc205defd473e SHA-256: 85110be792cba8cb77ab8ecbf6cfc3ba18e685cc37ae62f6e29196f850b821c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains references to 'macmillan english worksheets for grade 7', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of numerous external links and the identified malicious redirector strongly indicate a phishing or content-scraping campaign.

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.cc/pify?keyword=macmillan+english+worksheets+for+grade+7
    • http://files.fiveboroughbucketlist.com/uploads/1/3/2/8/132814972/4342650.pdf
    • http://files.linwoodrumney.com/uploads/1/3/1/4/131453255/sedemumejemojad-gavetoguriwus-bebodolopeju-rugiluxogugigo.pdf
    • http://files.lipsbylil.com/uploads/1/3/1/4/131406781/woxunidonulek-mesonanomi-zifutegudax.pdf
    • http://seduwaf.apply-me.com/uploads/1/3/1/3/131379182/wepowidu_kumejedapuvo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1134/1479/files/54284543261.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2713/files/55338734825.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/82667735603.pdf
    • https://cdn.shopify.com/s/files/1/0429/0877/8663/files/12102507581.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/adobe_indesign_cs6_basic_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/55774319403.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/31161793674.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/puregimerininunim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1150/5302/files/digital_amazing_bible_timeline.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/91492490971.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b9f.bin
c77e61e69aa8a373be56e34e71da9559d19ad71af72dd8e34818a292420c18d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9F 5464 bytes
font_01_sfnt_off00005e1b.bin
23a93f413b8bec28d3f0100075ca15c971c1c44c3a3631fde25c8f94b45b6500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 9928 bytes
font_02_sfnt_off00007fff.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFF 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.