Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd75b4d6e70bd94…

MALICIOUS

PDF

55.7 KB Created: 2020-08-10 01:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7710c3b0b6d53394c23a9f03ee0534 SHA-1: b5509692d22b94309209178ce9d231320292fffe SHA-256: 6fd75b4d6e70bd94b4f33a650c968150001175eff71e4b1a3ac914dee8947116
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate documents but ultimately lead to a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=angielski+techniczny+s%25C5%2582%25C3%25B3wka+pdf, which is flagged as a known malicious redirector. The document's structure suggests an attempt to manipulate search engine rankings or distribute malware through a link farm, leveraging numerous benign-looking Shopify links as a cover.

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=angielski+techniczny+s%25C5%2582%25C3%25B3wka+pdf
    • http://files.houseofenchantment.net/uploads/1/3/1/4/131411199/degumalarezib-gavaluxawuta-ximowozo-lejapaf.pdf
    • http://files.bowentherapyandreflexology.com.au/uploads/1/3/1/6/131607866/fff9fdb626ccfa.pdf
    • http://files.jasondrums.com/uploads/1/3/1/8/131856602/9499878.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0446/6507/7913/files/throwball_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/7442792415.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/gamerule_keepinventory_true.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/77848727552.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/bistronomy_french_food_unbound.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/82917377189.pdf
    • https://cdn.shopify.com/s/files/1/0434/5587/3190/files/80065031808.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/52027808623.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/mokelararuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/59504079305.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/56590757243.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/nixukalota.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007697.bin
cd13f5ebc8ccc2d2782223106cc84485d75935021174b488e163777ab1e7cc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7697 5808 bytes
font_01_sfnt_off00008a53.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A53 1800 bytes
font_02_sfnt_off000092e1.bin
5d63c30d6efd925ea78cd21e2038c049fa308823cb89ae5a197528d6ec853036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92E1 11900 bytes
font_03_sfnt_off0000b8f3.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F3 16312 bytes

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