Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e876c5c841e175c…

MALICIOUS

PDF

48.6 KB Created: 2020-08-14 14:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c52491be79c94f4cbcb14af34ac8fb SHA-1: 80237b2eef3f6d0a30750f95c2adc1a273692cb5 SHA-256: 1e876c5c841e175c67fe40a1cec071bea24c2993af84f088711a2d8280a43f5d
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 a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely intended to lead the user to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

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=carmine+gallo+the+storyteller%2527+s+secret+pdf
    • http://lizofopa.hoveyeyres.com/uploads/1/3/2/8/132814930/f7d53325214.pdf
    • http://files.shawnsaumell.com/uploads/1/3/0/7/130739263/nimofosafuwol.pdf
    • http://files.lillybirdbabyboutique.com/uploads/1/3/0/8/130813757/berowejisoz.pdf
    • http://tixigun.janiceragoart.com/uploads/1/3/1/6/131606183/lunatolutapebitop.pdf
    • http://files.coloradocrimevictims.org/uploads/1/3/1/0/131070230/fonivadivum_begaxenope.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/xemakuzibuxamilowaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2058/files/jasper_report_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/26035755472.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/domufivimixasom.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/ruviv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7383/0040/files/33129709611.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/793022413.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/suravorojokojavofusepaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/3302/5960/files/2_x_72_belt_grinder_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/78413143520.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eea.bin
44750551b180885d90f0d2d46df183db3b71176d4d65a855b112b7fc8ea107ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5516 bytes
font_01_sfnt_off0000818f.bin
996fdcfde3c4f8fdd457b961a17f5edfd2b04e15d4f14774d0f7e404e42b15e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818F 11024 bytes
font_02_sfnt_off0000a739.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA739 4324 bytes

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