Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db9367b4fa5be6c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-27 20:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4ce8283a2a2bad82760207ac9b4cd2d SHA-1: 37022885f6397d3862ce92bd0208071f694d0665 SHA-256: 9db9367b4fa5be6cbebdebcfec01cf8f26220241e7070da3e4c9ab1c6f5edb2c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=power+pro+quipp+dp600+manual`. This indicates the document is designed to lure users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm SEO tactic to distribute the malicious payload. The ML classifier also 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.cc/pify?keyword=power+pro+quipp+dp600+manual
    • http://xobut.victorialeeoboe.com/uploads/1/3/1/3/131383544/6038479.pdf
    • http://files.meganwhitley-mastersinmedicaldosimetry.com/uploads/1/3/1/4/131406592/fudavurisejosu_dowepurulosi_fugumebekakur.pdf
    • http://vemudeba.peakperformancefitnesstx.com/uploads/1/3/0/7/130775732/zudugupukitonu.pdf
    • http://files.llhugs.com/uploads/1/3/2/6/132682230/zirofanowudug-voxipowenejurot-xamizotazumexo-puzagaromerulum.pdf
    • http://tukigakid.mariaeburns.com/uploads/1/3/2/8/132814930/7267939.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/bearing_number_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/56735334628.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3713/files/guririjefol.pdf
    • https://cdn.shopify.com/s/files/1/0466/2807/7733/files/lepev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/46802608159.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/dijizodupetebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/13973432014.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/4464446930.pdf
    • https://cdn.shopify.com/s/files/1/0460/3969/5524/files/10th_class_2019_date_sheet_ts.pdf
    • https://cdn.shopify.com/s/files/1/0446/5829/4937/files/upsc_mathematics_optional_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/11842539734.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/ccna_dumps_2020_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c31.bin
54be4e6c8602bb96df9b259068952503d4302943e3772cd563f4105ee95a15d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 5444 bytes
font_01_sfnt_off00007ea9.bin
57f7d9803c8e7be3b65fc0b40c2ff7a74b0ee89b01fb7484c551d763ec9f030d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA9 10668 bytes

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