Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f817e541609b27…

MALICIOUS

PDF

53.3 KB Created: 2020-08-10 15:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fd55e24da57e653ddbe2ee58de25640 SHA-1: 469cd29e8dbf7556a8c4552b3010d5f9d002b166 SHA-256: f4f817e541609b2754b72f0d3a417a0a2462a75915908ba0a2342fc98e443654
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=4+qul+and+ayatul+kursi+pdf+download', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL, suggesting the primary intent is to redirect users to malicious content under the guise of providing Islamic texts.

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.cc/pify?keyword=4+qul+and+ayatul+kursi+pdf+download
    • http://files.pro-consolutions.com/uploads/1/3/1/6/131606526/bugof-dumevelewe.pdf
    • http://files.sgionet.com/uploads/1/3/0/8/130874413/zujojunejiguwimurob.pdf
    • http://files.gabrieleraussewinery.com/uploads/1/3/2/3/132303378/biganepagoxipu-bukosun.pdf
    • http://files.misshundleyscienceclass.com/uploads/1/3/1/0/131070459/wokilelaziwufi_lazila.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/exercice_sur_barycentre.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/1998_ford_f150_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/un_written_assessment_test_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/9097/6673/files/30708085441.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/zigofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/bonekomofagafugevisorog.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/zepotilunatejerolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/fufameziwateduxutixo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/55650323761.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/xebevabajanuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009702.bin
5f9ef41d0475143a03f27109e492fe8dc271078f5133886d001770446558a029		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9702 27048 bytes
font_00_sfnt_off00006045.bin
9ff38dc9210a21396c4e6aec133c486fbd43f1a053ddb44777c4cd7f5d7fb423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 5412 bytes
font_01_sfnt_off000072d5.bin
26ccd872df05c8c390f87593ea8e96933701da12738d660646fb7b6698597edb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 10620 bytes

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