Malicious PDF — malware analysis report

Static analysis result for SHA-256 4392ff8be49f33e1…

MALICIOUS

PDF

44.2 KB Created: 2020-08-28 17:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0477828f2d234e166785af1278141b9 SHA-1: c175094d06ccaee613502a24562e16567a922375 SHA-256: 4392ff8be49f33e1b1115873e40ae8430d954e04d264cf64b0603f64049d9475
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 pointing to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. This indicates a phishing or scam attempt, likely to direct users to malicious content. The ML classifier strongly supports the malicious verdict.

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=jquery+animation+tutorial
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdf
    • http://molat.thegoodbeerwife.com/uploads/1/3/2/7/132740900/214ce1a8.pdf
    • http://files.mncampbell.com/uploads/1/3/1/4/131437322/399218.pdf
    • https://cdn.shopify.com/s/files/1/0433/1552/7833/files/80377824284.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/15996039340.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/xatifokipejavabilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/nametevupadagogaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/evermotion_archmodels_27.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/6580298951.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/cutting_edge_elementary_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9605/files/kofevarev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/2015_ford_edge_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1569/0650/files/ejercicios_solubilidad_3o_eso_resuel.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/19555000925.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/bidukiwadusogori.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/tezitexopurifajorepozajo.pdf
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/database_system_concepts_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/23583818308.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/1/0432/1044/0859/files/2015

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006870.bin
31f2359ab1435c556a3e671ef0c9fd3189ff862b3368e5618f590a994c8a3858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 4872 bytes
font_01_sfnt_off000078f5.bin
dcb43abe3cd67eff8db6165d291c404eac402bdb171c1b99e67c5c243fe13f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 13284 bytes

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