Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9cda378bbc41505…

MALICIOUS

PDF

35.2 KB Created: 2020-08-26 06:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1abaa1ddae659685eb0da7c34df84adc SHA-1: eadc4ed8e1d69c1c2eb3cfbc8bf7168c674c5a5d SHA-256: d9cda378bbc41505da6e325d21000b20d9b8a305083cf61da535e1fe9e279593
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=lego+minifigures+template'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains hosting PDF files, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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.me/pify?keyword=lego+minifigures+template
    • http://files.backcountrywinery.com/uploads/1/3/0/7/130775062/soruwasam-pagedevokuwo-bokugiratasob-mowelabu.pdf
    • http://sufiwin.danrednermusic.com/uploads/1/3/2/7/132740805/616352cb.pdf
    • http://files.rutherforders7.com/uploads/1/3/0/7/130775858/f18a506ea12.pdf
    • http://files.aclinlab.org/uploads/1/3/1/3/131383247/1021a027.pdf
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/algorithms_4th_ed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/spss_survival_manual_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/subitevawinozutudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/gimp_2._8._2_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4990/0439/files/forensic_anthropology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/fajawenob.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/59837156086.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2099/files/maruf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/flow_cytometry_basics_guide_bio_rad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/40925935047.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/50362185328.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/9674014593.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/1/0428/3714/781

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004aa5.bin
7663bf7f57764b1164c029bf075210f1ea826263a394e21d5a3fc0915a46a8e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA5 5164 bytes
font_01_sfnt_off00005c28.bin
b9014bb28ed0d19bf1bff3db97fc21e97ed6f4d963cc09e916f448bf9ec7d34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C28 10576 bytes

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