Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f3ee817f4b29bc…

MALICIOUS

PDF

49.6 KB Created: 2020-08-09 11:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d886615cbf04d43eef6a8c6187fdcb86 SHA-1: 3c23a87abad44b11f2245afd7e3404cdb50d1350 SHA-256: 58f3ee817f4b29bcd10e532e526ea9548c547a878d97d068f9b770009b34ecf4
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 domains associated with SEO link farms or redirectors. The primary redirector URL, https://ttraff.ru/pify?keyword=geometric+figures+and+formulas+pdf, is flagged as malicious. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware distribution, leveraging SEO tactics to increase visibility.

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.ru/pify?keyword=geometric+figures+and+formulas+pdf
    • http://files.linkedthruleonard.com/uploads/1/3/1/3/131384552/ac83dcbb41.pdf
    • http://jowurebix.brandysboutiqueandgifts.com/uploads/1/3/2/7/132740892/9430352.pdf
    • http://files.houseofportfolios-intl.com/uploads/1/3/0/7/130776393/dapasawajikepatalax.pdf
    • http://files.visionsusa.org/uploads/1/3/1/4/131453054/bdc51e307bf9.pdf
    • http://files.bluechillithai.co/uploads/1/3/1/4/131437669/sisesesatu-sipaxo-figutinep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/lomujawadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0439/2773/2379/files/evangelios_apocrifos_completos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/14702465436.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/leluzukaduwen.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/xinap.pdf
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/6157814368.pdf
    • https://cdn.shopify.com/s/files/1/0436/1581/3795/files/process_fluid_mechanics_denn.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/articles_on_quality_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/vibumom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006019.bin
9d07f91416307cfaafc3609367b866b0fd37ddd2a50acd479d55253a1f4b8cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 5388 bytes
font_01_sfnt_off0000725f.bin
128afc57ba611a3cd7891243f8c7164d7dc272eac8fcd010280ed1c1631beb38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725F 10500 bytes
font_02_sfnt_off0000966b.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966B 16060 bytes
font_03_sfnt_off0000aaff.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAFF 4324 bytes

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