Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fbc68edd1a69f9…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 21:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb61acd290cf8965e4d0feb8140d6705 SHA-1: ead653848bb5b92f10809c22d683a36bb409cd53 SHA-256: 42fbc68edd1a69f9dafc687a30a0b70e0e03824e0d0cb5ea6a79f5ff50b0b2eb
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a sports schedule, which is a common social engineering tactic. The link redirects to `https://ttraff.com/pify?keyword=chicago+cubs+tv+schedule+2020+pdf`, likely leading to further malicious content. The document also hosts a large number of other PDF links, suggesting a link farm or SEO poisoning attempt.

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=chicago+cubs+tv+schedule+2020+pdf
    • http://files.autorematch.com/uploads/1/3/2/6/132695493/kawekoxafat-temigi-xudinafuza-zibanuf.pdf
    • http://files.wearecommunityfirst.org/uploads/1/3/1/4/131406173/judujusufekeniki.pdf
    • http://gotaveb.littleacornsharlow.com/uploads/1/3/1/8/131871699/jusepamo.pdf
    • http://files.thiefshow.com/uploads/1/3/2/6/132681611/jigexixumawa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/12579530410.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/48721481974.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/69410371721.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/antibiotic_classification_and_uses.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/naresigalilezesap.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/sector_and_segment_of_a_circle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/63290894625.pdf
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/barodimovidixikij.pdf
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/aerobia_y_anaerobia.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/76327955253.pdf
    • https://cdn.shopify.com/s/files/1/0429/3754/8959/files/annexure_b_form_for_passport.pdf
    • https://cdn.shopify.com/s/files/1/0452/4130/3202/files/blank_sheet_music_treble.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9946/files/luparixifibulu.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_off00005daf.bin
fa1d9c77fd509abb65b76ed0d115057844af75e4c0777932bafffd39f21efaf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 5700 bytes
font_01_sfnt_off00007113.bin
44432c394bdc8574fce697d862191889eee646972e3d6b478729da2f844dd9e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7113 10928 bytes

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