Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4c8f594a872c7f…

MALICIOUS

PDF

61.2 KB Created: 2020-08-11 00:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd4fa4de252d820154c5371aaf0c3ae SHA-1: 135b8692c218da8a57497ce99b7bc7905556ac6d SHA-256: 4a4c8f594a872c7f7739f7c6cc10e000582d55744b3a994f7d58b918b0e54c23
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'bending moment diagram formula pdf' and includes the malicious URL. This suggests a social engineering lure to trick users into visiting a malicious site.

Heuristics 3

  • 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.
  • 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=bending+moment+diagram+formula+pdf
    • http://files.negsbestthing.com/uploads/1/3/2/8/132815961/riwemuto.pdf
    • http://wameku.tarotica.net/uploads/1/3/1/0/131070872/ec13f562cb5.pdf
    • http://files.biblebasedmedicine.com/uploads/1/3/0/8/130814106/aa41a6d5fd8eddb.pdf
    • http://jukapo.hofvanbarlo.nl/uploads/1/3/0/9/130969762/kavinomaluval_xinam.pdf
    • http://saduv.temeculatowcompany.com/uploads/1/3/0/7/130776208/degumeza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/christian_apologetics_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0436/0231/3373/files/kotelakita.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/refrigerator_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/spelling_words_with_definitions_and_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/student_exploration_carbon_cycle_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/miroginomawadafarat.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/lekurifaxexujuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/38322920865.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/derigazopavusuzufevu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/dogitaletazidosuwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/zoxoveruvubop.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/33682093234.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
font_00_sfnt_off000095c2.bin
d799579642285cbdbc12c580afe889a91353f39e890b37831e2848eda14588b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C2 5232 bytes
font_01_sfnt_off0000a775.bin
783792fe7b17b142ce55cd50dab0e84ce51ca7b963c027119ee7a06b7a9fb99e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA775 13344 bytes
font_02_sfnt_off0000d20f.bin
a7caa719e27365ea24523ee7407053f381c70a1f359101088260ac16fa660871
pdf-font-stream PDF embedded font (sfnt) at offset 0xD20F 16096 bytes